<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="./react18/react.development.js"></script>
    <script src="./react18/react-dom.development.js"></script>
  </head>
  <body>
    <div id="app">
      <p></p>
      <span></span>
      <em></em>
    </div>

    <script>
      const vDOMEm = React.createElement("em", {}, "em");
      const vDOMSpan = React.createElement("span", {}, "我是span", vDOMEm);
      const vDOM = React.createElement(
        "div",
        { id: "box", className: "content" },
        "hello vDOM",
        "hello world",
        vDOMSpan
      );
      console.log(vDOM);
      const root = ReactDOM.createRoot(document.getElementById("app"));
      root.render(vDOM);
    </script>
  </body>
</html>
